<template>
  <div>
    <table border="1" width="700" style="border-collapse: collapse">
      <caption>
        购物车
      </caption>
      <thead>
        <tr>
          <th><input type="checkbox" v-model="isall" /> <span>全选</span></th>
          <th>名称</th>
          <th>价格</th>
          <th>数量</th>
          <th>总价</th>
          <th>操作</th>
        </tr>
      </thead>
      <tbody>
        <tr v-for="(item, index) in goodList" :key="index">
          <td><input type="checkbox" :class="item.checked" /></td>
          <td>{{ item.name }}</td>
          <td>{{ item.price }}</td>
          <td>
            <button   @click="item.num > 1 && item.num--">-</button>
            {{ item.num }}
            <button @click="item.num++">+</button>
          </td>
          <td>{{ item.num * item.price }}</td>
          <td><button @click="splicefn(index)">删除</button></td>
        </tr>
      </tbody>
      <tfoot>
        <tr>
          <td>合计:</td>
          <td colspan="5"></td>
        </tr>
      </tfoot>
    </table>
  </div>
</template>

<script>
export default {
  data() {
    return {
    
      goodList: [
        { name: "诸葛亮", price: 1000, num: 1, checked: false },
        { name: "蔡文姬", price: 1500, num: 1, checked: false },
        { name: "妲己", price: 2000, num: 1, checked: false },
        { name: "鲁班", price: 2200, num: 1, checked: false },
      ],
    };
  },
  methods:{
    splicefn(index){
      this.goodList.splice(index,1)
    }
  },
  computed:{
    isall:{
      set(val){
        this.goodList.forEach(item=>item.checked=val)
        console.log(val);
      }
    }
  
  },
  // watch: {
  //   deep:true,
  //   handler(){

  //   }
  // }
};
</script>

<style>
</style>